Initial revision

Author: mblaschke

.gitignore

@@ -0,0 +1,5 @@
+*.6
+/gr-*
+/goreplace
+/build/
+/.idea

Makefile

@@ -0,0 +1,40 @@
+SOURCE = $(wildcard *.go)
+TAG ?= $(shell git describe --tags)
+GOBUILD = go build -ldflags '-w'
+
+ALL = \
+	$(foreach arch,64 32,\
+	$(foreach suffix,linux osx win.exe,\
+		build/gr-$(arch)-$(suffix)))
+
+all: $(ALL)
+
+clean:
+	rm -f $(ALL)
+
+# os is determined as thus: if variable of suffix exists, it's taken, if not, then
+# suffix itself is taken
+win.exe = windows
+osx = darwin
+build/gr-64-%: $(SOURCE)
+	@mkdir -p $(@D)
+	CGO_ENABLED=0 GOOS=$(firstword $($*) $*) GOARCH=amd64 $(GOBUILD) -o $@
+
+build/gr-32-%: $(SOURCE)
+	@mkdir -p $(@D)
+	CGO_ENABLED=0 GOOS=$(firstword $($*) $*) GOARCH=386 $(GOBUILD) -o $@
+
+release: $(ALL)
+ifndef desc
+	@echo "Run it as 'make release desc=tralala'"
+else
+	github-release release -u webdevops -r goreplace -t "$(TAG)" -n "$(TAG)" --description "$(desc)"
+	@for x in $(ALL); do \
+		echo "Uploading $$x" && \
+		github-release upload -u webdevops \
+                              -r goreplace \
+                              -t $(TAG) \
+                              -f "$$x" \
+                              -n "$$(basename $$x)"; \
+	done
+endif

README.md

@@ -1,2 +1,4 @@
 # goreplace
 Replace cli utility written in golang
+
+Inspired by https://github.com/piranha/goreplace

goreplace.go

@@ -0,0 +1,98 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"regexp"
+	flags "github.com/jessevdk/go-flags"
+)
+
+const (
+	Author  = "webdevops.io"
+	Version = "1.0"
+)
+
+var opts struct {
+	Search          string   `short:"s" long:"regex" description:"Search regexp" value-name:"RE"`
+	Replace         string   `short:"r" long:"replace" description:"replace found substrings with RE" value-name:"RE"`
+	IgnoreCase      bool     `short:"i" long:"ignore-case" description:"ignore pattern case"`
+	PlainText       bool     `short:"p" long:"plain" description:"treat pattern as plain text"`
+	Verbose         bool     `short:"v" long:"verbose" description:"verbose mode"`
+	ShowVersion     bool     `short:"V" long:"version" description:"show version and exit"`
+	ShowHelp        bool     `short:"h" long:"help" description:"show this help message"`
+}
+
+var argparser = flags.NewParser(&opts, flags.PrintErrors|flags.PassDoubleDash)
+
+func replaceInFile(file string) {
+	var err error
+
+    read, err := ioutil.ReadFile(file)
+    if err != nil {
+        panic(err)
+    }
+
+    content := string(read)
+
+    if opts.PlainText {
+        if strings.Contains(content, opts.Search) {
+            content = strings.Replace(content, opts.Search, opts.Replace, -1)
+            writeContentToFile(file, content)
+        }
+    } else {
+        regex := opts.Search
+
+        if opts.IgnoreCase {
+            regex = "(?i:" + regex + ")"
+        }
+
+        re := regexp.MustCompile(regex)
+
+		if re.MatchString(content) {
+		    content = re.ReplaceAllString(content, opts.Replace)
+		    writeContentToFile(file, content)
+		}
+    }
+
+}
+
+func writeContentToFile(file string, content string) {
+    var err error
+    err = ioutil.WriteFile(file, []byte(content), 0)
+    if err != nil {
+        panic(err)
+    }
+}
+
+func main() {
+	args, err := argparser.Parse()
+    if err != nil {
+        panic(err)
+        os.Exit(1)
+    }
+
+	if opts.ShowVersion {
+		fmt.Printf("goreplace %s\n", Version)
+		return
+	}
+
+	if (opts.ShowHelp) || (opts.Search == "") || (opts.Replace == "") || (len(args) > 0)  {
+		fmt.Println("Usage: golang -s <search regex> -r <replace string> file1 file2 file3")
+		argparser.WriteHelp(os.Stdout)
+		os.Exit(1)
+	}
+
+    for i := range args {
+        var file string
+        file = args[i]
+
+        if opts.Verbose {
+            fmt.Printf(" - checking %s\n", file)
+        }
+        replaceInFile(file)
+    }
+
+    os.Exit(0)
+}